package com.itheima.service.impl;/*
 *      .--,       .--,
 *     ( (  \.---./  ) )
 *     '.__/o   o\__.'
 *        {=  ^  =}
 *         >  -  <
 *        /       \
 *       //       \\
 *      //|   .   |\\
 *      "'\       /'"_.-~^`'-.
 *         \  _  /--'         `
 *       ___)( )(___
 *      (((__) (__)))    高山仰止,景行行止.虽不能至,心向往之。
 *
 * @author JiaoDaoNiu
 * @create 2022-09-24-14:46
 */

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.common.CustomException;
import com.itheima.entity.Category;
import com.itheima.entity.Dish;
import com.itheima.entity.Setmeal;
import com.itheima.mapper.CategoryMapper;
import com.itheima.service.CategoryService;
import com.itheima.service.DishService;
import com.itheima.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;


    /**
     * 根据id删除分类，删除之前需要进行判断
     * @param id
     */
    @Override
    public void remove(Long id) {

        //添加查询条件，根据分类id进行查询菜品数据
        LambdaQueryWrapper<Dish> dishLQW=new LambdaQueryWrapper<>();
        dishLQW.eq(Dish::getCategoryId,id);
        int count1 = dishService.count(dishLQW);

        //如果已经关联，抛出一个业务异常
        if(count1>0){
            throw new CustomException("当前分类下关联了菜品，不能删除");//已经关联菜品，抛出一个业务异常
        }

        //查询当前分类是否关联了套餐，如果已经关联，抛出一个业务异常
        LambdaQueryWrapper<Setmeal> setmealLQW=new LambdaQueryWrapper<>();
        setmealLQW.eq(Setmeal::getCategoryId,id);
        int count2 = setmealService.count(setmealLQW);
        if(count2>0){
            throw new CustomException("当前分类下关联了套餐，不能删除");//已经关联套餐，抛出一个业务异常
        }


        //正常删除分类
        super.removeById(id);
    }

}



/*    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;

    *//**
     * 根据id删除分类，删除之前需要进行判断
     * @param id
     *//*
    @Override
    public void remove(Long id) {
        //添加查询条件，根据分类id进行查询菜品数据
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int count1 = dishService.count(dishLambdaQueryWrapper);
        //如果已经关联，抛出一个业务异常
        if(count1 > 0){
            throw new CustomException("当前分类下关联了菜品，不能删除");//已经关联菜品，抛出一个业务异常
        }

        //查询当前分类是否关联了套餐，如果已经关联，抛出一个业务异常
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int count2 = setmealService.count(setmealLambdaQueryWrapper);
        if(count2 > 0){
            throw new CustomException("当前分类下关联了套餐，不能删除");//已经关联套餐，抛出一个业务异常
        }

        //正常删除分类
        super.removeById(id);
    }*/
